Here's my first attempt at this ages ago Heavy/Scratch: - Ultimate Optimus Trailer/Exosuit Separation. I'm using the 07 leader Prime as the base because my other movie Prime is too good to cover up. Still have a while to go, but this is what the main armor will look like.
So my question is, I saw your mark 3 version of this and I saw a listing for this on eBay, is it possible to put a oversized siege prime in there? Or is it just mark 3?
This old one only fits 2007 Optimus. Probably just the one that's included since I put a couple magnets and cut off the back wheels.